package com.xuzz.study.springboot;

public class DemoService {
    public String sayWhat;
     public String toWho;
     public DemoService(String sayWhat, String toWho){
              this.sayWhat = sayWhat;
              this.toWho = toWho;
          }
     public String say(){
               return this.sayWhat + "!  " + toWho;
           }
}
